The potpourri I bought is powered by a small light bulb. It's not the same with the old potpourris where the oil will be heated with the use of a candle. The potpourri that I bought is safer than the candle-lit ones.
I initially wanted to buy some herbal oils to be used for this and one particular oil that I've been looking for is citronella. Citronella might not be too pleasant for everybody's nose but it is a very good repellent for mosquitoes and other insects. The Citronella oil was out of stock at the department store where I bought the potpourri and it made me think that I should add Citronella on my growing herb garden.
Speaking of herbs, I have just transferred some tarragon seedlings at my new plot today. I use fresh tarragon leaves for tea. In some parts of the world, herbs are used as party enhancers. I've read from Herbal City LLC that herbal products, such as what they call as the K6 Herbal Incense could be used to alleviate stress, depression, and anxiety. Spiritual powders are also available if you want some surge of energy for all-night parties. So herbs are not just for cooking!
It's always best to grow your herbs in your own garden. But it's also convenient to buy. If you're looking for essential oils and herbal products, be sure to first check it's legality. Better be sure than sorry.